There are three main claims in the paper: first, there is sufficient evidence for affirming that Ricardo adhered to Smith's productivity theory second, Ricardo's original demonstration of the comparative- advantage proposition is indeed compatible and complementary with respect to the latter;...

In terms of convex analysis the revenue function of a country with a given factor endowment may be seen as the support function of the production possibility set. At the same time this revenue function is the so called convex-conjugate of the indicator function of the production possibility set....